Electronic apparatus, power supply device, system and apparatus

ABSTRACT

A power supply device is caused to execute a new program. An electronic apparatus that receives power from a power supply device in a non-contact manner includes: an intra-apparatus circuit that operates with power received via a power transmission path from the power supply device to the electronic apparatus; a program acquiring unit that acquires a program to be executed by the power supply device from outside, and stores the program; and an apparatus-side communicating unit that transmits the program to the power supply device via the power transmission path.

This is a Continuation of U.S. application Ser. No. 15/634,455 filedJun. 27, 2017, which is a Continuation of U.S. application Ser. No.14/239,840 filed Feb. 20, 2014, which is a National Phase ofInternational Application No. PCT/JP2012/005191 filed Aug. 17, 2012,which claims the benefit of priority of JP2011-181965 filed Aug. 23,2011. The disclosure of the prior applications are hereby incorporatedby reference herein in their entirety.

1. TECHNICAL FIELD

The present invention relates to an electronic apparatus, a power supplydevice, a system, and an apparatus.

2. RELATED ART

An electrically non-contact power charging system for an electronicapparatus has been known. When an electronic apparatus is located at aposition where power supply is possible, the system starts power supplyafter authentication of the electronic apparatus.

Patent Document No. 1: Japanese Patent Application Publication No.2009-213295 SUMMARY

In such a system, a power supply device has a processor for a processingwith an electronic apparatus, such as communication and authentication.The processor executes a program preloaded at the time of factoryshipment and the like to perform a processing such as communication andauthorization.

Programs are updated to newer versions day by day. However, the powersupply device in such a system does not have functions for communicationor connectivity with an external memory. Accordingly, the power supplydevice has not been able to update a preloaded program.

Therefore, it is an object of an aspect of the innovations herein toprovide an electronic apparatus, a power supply device, system andapparatus, which are capable of overcoming the above drawbacksaccompanying the related art. The above and other objects can beachieved by combinations described in the claims. A first aspect of thepresent invention provides an electronic apparatus that receives powerfrom a power supply device in a non-contact manner, the electronicapparatus including: an intra-apparatus circuit that operates with powerreceived via a power transmission path from the power supply device tothe electronic apparatus; a program acquiring unit that acquires aprogram to be executed by the power supply device from outside, andstores the program; and an apparatus-side communicating unit thattransmits the program to the power supply device via the powertransmission path.

A second aspect of the present invention provides an electronicapparatus that receives power from a power supply device in anon-contact manner, the electronic apparatus including: anintra-apparatus circuit that operates with power received from the powersupply device via a power transmission path from the power supply deviceto the electronic apparatus; a supply-side communicating unit thatreceives, from the power supply device via the power transmission path,a program to be executed by the electronic apparatus; and a processorthat executes the program received by the supply-side communicating unitto control the intra-apparatus circuit.

A third aspect of the present invention provides a power supply devicethat supplies power to an electronic apparatus in a non-contact manner,the power supply device including: a supply-side communicating unit thatreceives, from the electronic apparatus via a power transmission pathfrom the power supply device to the electronic apparatus, a program tobe executed by the power supply device; and a control processor thatexecutes the program received by the supply-side communicating unit tocontrol power supply to the electronic apparatus.

A fourth aspect of the present invention provides a power supply devicethat supplies power to an electronic apparatus in a non-contact manner,the power supply device including: a program acquiring unit thatacquires a program to be executed by the electronic apparatus fromoutside, and stores the program; and an apparatus-side communicatingunit that transmits, to the electronic apparatus via a powertransmission path from the power supply device to the electronicapparatus, the program that the program acquiring unit stores.

A fifth aspect of the present invention provides a system including anelectronic apparatus and a power supply device that supplies power tothe electronic apparatus in a non-contact manner, wherein the electronicapparatus includes: an intra-apparatus circuit that operates with powerreceived via a power transmission path from the power supply device tothe electronic apparatus; a program acquiring unit that acquires aprogram to be executed by the power supply device from outside, andstores the program; and an apparatus-side communicating unit thattransmits the program to the power supply device via the powertransmission path, and the power supply device includes: a supply-sidecommunicating unit that receives the program from the electronicapparatus via the power transmission path; and a control processor thatexecutes the program received by the supply-side communicating unit tocontrol power supply to the electronic apparatus.

A sixth aspect of the present invention provides a system including anelectronic apparatus and a power supply device that supplies power tothe electronic apparatus in a non-contact manner, wherein the powersupply device includes: a program acquiring unit that acquires a programto be executed by the electronic apparatus from outside, and stores theprogram; and an apparatus-side communicating unit that transmits, to theelectronic apparatus via a power transmission path from the power supplydevice to the electronic apparatus, the program that the programacquiring unit stores, and the electronic apparatus includes: anintra-apparatus circuit that operates with power received from the powersupply device via the power transmission path; a supply-sidecommunicating unit that receives the program from the power supplydevice via the power transmission path; and a processor that executesthe program received by the supply-side communicating unit to controlthe intra-apparatus circuit.

A seventh aspect of the present invention provides an apparatus thatexchanges power with another apparatus in a non-contact manner, theapparatus including a communicating unit that performs at least eitherone of transmission and reception of a program between the apparatus andthe other apparatus via a power transmission path for exchanging powerwith the other apparatus in a non-contact manner.

The summary clause does not necessarily describe all necessary featuresof the embodiments of the present invention. The present invention mayalso be a sub-combination of the features described above.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the appearance of a power charging system 10 according toan embodiment.

FIG. 2 shows the functions and configuration of the power chargingsystem 10 according to the present embodiment.

FIG. 3 shows a first flow of power charge and a program updating processin the power charging system 10 according to the present embodiment.

FIG. 4 shows a second flow of power charge and a program updatingprocess in the power charging system 10 according to the presentembodiment.

FIG. 5 shows a third flow of power charge and a program updating processin the power charging system 10 according to the present embodiment.

FIG. 6 shows a fourth flow of power charge and a program updatingprocess in the power charging system 10 according to the presentembodiment.

FIG. 7 shows the functions and configuration of the power chargingsystem 10 according to a first variant of the present embodiment.

FIG. 8 shows the appearance of the power charging system 10 according toa second variant of the present embodiment.

FIG. 9 shows the functions and configuration of a power supply device 30in the power charging system 10 according to the second variant of thepresent embodiment.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, (some) embodiment (s) of the present invention will bedescribed. The embodiment (s) do (es) not limit the invention accordingto the claims, and all the combinations of the features described in theembodiment (s) are not necessarily essential to means provided byaspects of the invention.

FIG. 1 shows the appearance of a power charging system 10 according toan embodiment. The power charging system 10 according to the presentembodiment includes an electronic apparatus 20 and a power supply device30. The electronic apparatus 20 operates with power stored in asecondary battery inside thereof.

The power supply device 30 supplies power to the electronic apparatus 20in a non-contact manner. Here, when power is supplied “in a non-contactmanner”, metallic terminals are not connected directly for conduction,and components may be in mechanical contact via insulating materials andthe like of the housings of the apparatus and the like. In the presentembodiment, the power supply device 30 supplies power to the electronicapparatus 20 by electromagnetic induction using a coil. Alternatively,the power supply device 30 may supply power, for example, by electricfield and magnetic resonance. Techniques of supplying power to theelectronic apparatus 20 in a non-contact manner are called wirelesspower supply, non-contact power transfer, non-contact power transmissionand the like.

For example, the power supply device 30 is tabular, and supplies powerto the electronic apparatus 20 in a state that the electronic apparatus20 is placed on the surface thereof. With the power charging system 10,the electronic apparatus 20 can be charged merely by being placed on thepower supply device 30 without requiring special attachment anddetachment operations with respect to a charging apparatus.

FIG. 2 shows the functions and configuration of the power chargingsystem 10 according to the present embodiment. When the electronicapparatus 20 is placed on the power supply device 30, a powertransmission path 25 is formed to transmit power from the power supplydevice 30 to the electronic apparatus 20 in an electrically non-contactmanner. Thereby, the power supply device 30 can charge the electronicapparatus 20. In the present embodiment, the power transmission path 25is a pathway that transmits power by electromagnetic induction.

The electronic apparatus 20 has a power receiving unit 32, a secondarybattery 34, a power charge control unit 36, an intra-apparatus circuit38, a program acquiring unit 40, an apparatus-side communicating unit42, and a processor 44. The power receiving unit 32 receives power fromthe power supply device 30 in a non-contact manner. In the presentembodiment, the power receiving unit 32 has a coil 46, and workstogether with a power supply unit 52 of the power supply device 30 toform the power transmission path 25.

The secondary battery 34 stores power received via the powertransmission path 25. The power stored in the secondary battery 34 issupplied to each circuit in the electronic apparatus 20.

The power charge control unit 36 causes the power that the powerreceiving unit 32 has received from the power supply device 30 to besupplied to and stored in the secondary battery 34. For example, thepower charge control unit 36 rectifies and converts an AC voltagereceived from the power receiving unit 32 into a DC voltage, and causesthe power to be stored in the secondary battery 34.

The intra-apparatus circuit 38 operates with power received from thepower supply device 30 via the power transmission path 25. In thepresent embodiment, the intra-apparatus circuit 38 operates with powerstored in the secondary battery 34.

The program acquiring unit 40 acquires a designated program from theoutside of the electronic apparatus 20 and stores the program therein.For example, the program acquiring unit 40 downloads a designatedprogram from an external server via a network and stores the programtherein. Also, for example, the program acquiring unit 40 reads out adesignated program from an external memory such as a memory card that ismounted to the electronic apparatus 20, and stores the program therein.

The program acquiring unit 40 acquires, as such a designated program, anupdating program for updating a program that is currently executed by acontrol processor 58 of the power supply device 30. For example, theprogram acquiring unit 40 acquires an updating program for updating apower charge control program of the power supply device 30. Also, whenthe power supply device 30 performs functions other than power supply,an updating program for updating a program to control the functions maybe acquired. For example, the program acquiring unit 40 acquires anupdating program for updating a scheme to authenticate an ID between thepower supply device 30 and the electronic apparatus 20. Also, forexample, the program acquiring unit 40 acquires an updating program forcausing a program that is currently executed by the power supply device30 to support a new type of the electronic apparatus 20.

Also, a program that the program acquiring unit 40 acquires is notlimited to a program aimed for an update, but the program acquiring unit40 may acquire a new program that can add a new function to the powersupply device 30. For example, the program acquiring unit 40 acquires aprogram for causing the power supply device 30 to function as an imagedisplay apparatus, a program for causing the power supply device 30 tofunction as a music player apparatus, a program for causing the powersupply device 30 to function as a clock, and other programs.

The apparatus-side communicating unit 42 communicates data with thepower supply device 30 via the power transmission path 25. In thepresent embodiment, the apparatus-side communicating unit 42communicates data with a supply-side communicating unit 56 in the powersupply device 30 by modulating and demodulating current flowing throughthe coil 46 of the power receiving unit 32 according to a predeterminedscheme. In the present embodiment, the apparatus-side communicating unit42 transmits a program acquired by the program acquiring unit 40 to thepower supply device 30 via the power transmission path 25.

The processor 44 controls each circuit, including the intra-apparatuscircuit 38, in the electronic apparatus 20. Furthermore, the processor44 executes an authentication process and the like with the power supplydevice 30 using data that the apparatus-side communicating unit 42 hascommunicated with the power supply device 30.

The power supply device 30 has the power supply unit 52, a supplycontrol unit 54, the supply-side communicating unit 56, and the controlprocessor 58. The power supply unit 52 supplies power to the electronicapparatus 20 in a non-contact manner. In the present embodiment, thepower supply unit 52 has a coil 62, and works together with the powerreceiving unit 32 of the electronic apparatus 20 to form the powertransmission path 25.

The supply control unit 54 receives power from an external power supply,and controls the power supply unit 52 to transfer the power receivedfrom the external power supply to the electronic apparatus 20 via thepower transmission path 25. For example, the supply control unit 54varies current flowing through the coil 62 of the power supply unit 52to induce current in the coil 46 of the power receiving unit 32 byelectromagnetic induction.

The supply-side communicating unit 56 communicates data with theelectronic apparatus 20 via the power transmission path 25. In thepresent embodiment, the supply-side communicating unit 56 communicatesdata with the apparatus-side communicating unit 42 in the electronicapparatus 20 by modulating and demodulating current flowing through thecoil 62 of the power supply unit 52 according to a predetermined scheme.In the present embodiment, the supply-side communicating unit 56receives a program from the electronic apparatus 20 via the powertransmission path 25.

The control processor 58 controls each circuit in the power supplydevice 30. Also, the control processor 58 executes an authenticationprocess and the like with the electronic apparatus 20 using data thatthe supply-side communicating unit 56 has communicated with theelectronic apparatus 20. Also, the control processor 58 controls thepower supply amount of the supply control unit 54.

Furthermore, when the supply-side communicating unit 56 receives aprogram, the control processor 58 executes the received program. In thepresent embodiment, the control processor 58 controls power supply tothe electronic apparatus 20 by executing a program received by thesupply-side communicating unit 56.

Either or both of the electronic apparatus 20 and the power supplydevice 30 may further have a transfer status display unit 60. Thetransfer status display unit 60 displays the transfer status, thetransfer rate, the amount of data that has been transferred, and thelike about a program transferred from the electronic apparatus 20 to thepower supply device 30. Thereby, the transfer status display unit 60 cannotify a user of to what extent a transfer has completed.

With the power charging system 10, power can be supplied from the powersupply device 30 to the electronic apparatus 20 by placing theelectronic apparatus 20 on the power supply device 30. Furthermore, withthe power charging system 10, a program to be executed in the powersupply device 30 can be acquired by the electronic apparatus 20 andtransferred to the power supply device 30 via the power transmissionpath 25. Thereby, with the power charging system 10, a new program canbe executed by the power supply device 30 even when the power supplydevice 30 does not have a function to acquire data from the outside.

FIG. 3 shows a first flow of power charge and a program updating processin the power charging system 10 according to the present embodiment.First, the electronic apparatus 20 is placed on the power supply device30 (S11). The power supply device 30 detects whether the electronicapparatus 20 has been located at a position where the electronicapparatus 20 can receive power from the power supply device 30. Forexample, the power supply device 30 detects whether the electronicapparatus 20 has been placed by using a sensor. Also, for example, thepower supply device 30 detects whether the electronic apparatus 20 hasbeen placed based on a load change in the power transmission path 25.

Subsequently, the power supply device 30 supplies power to theelectronic apparatus 20 via the power transmission path 25, under acondition that the electronic apparatus 20 has been located at aposition where the electronic apparatus 20 can receive power (S12). At astep S12, more specifically, the power supply device 30 firstcommunicates with the electronic apparatus 20 via the power transmissionpath 25 to authenticate whether the placed electronic apparatus 20 is anapparatus to which power is allowed to be supplied (S12-1). When theplaced electronic apparatus 20 is authenticated, the power supply device30 subsequently supplies power to the electronic apparatus 20 via thepower transmission path 25 (S12-2). Thereby, the electronic apparatus 20can charge the secondary battery 34 with power supplied from the powersupply device 30.

Then, the power supply device 30 stops power supply at a time whensufficient power is stored in the secondary battery 34 of the electronicapparatus 20. When power supply is stopped, the power supply device 30subsequently transmits, to the electronic apparatus 20 via the powertransmission path 25, a request to transfer an updating program (S13).More specifically, the power supply device 30 transmits a request totransfer an updating program, under a condition that the electronicapparatus 20 has been located at a position where the electronicapparatus 20 can receive power and the power supply device 30 is notsupplying power to the electronic apparatus 20.

Upon acquiring, from the power supply device 30, the request to transferan updating program from the electronic apparatus 20, the electronicapparatus 20 confirms whether there is an updating program for the powersupply device 30 with a designated server via a network (S14). Whenthere is an updating program in the server, the electronic apparatus 20downloads and acquires the updating program from the server (S15). Inthis case, when there is an updating program in an external memory, theelectronic apparatus 20 may read out and acquire the updating programfrom the external memory instead of from the server.

Subsequently, the electronic apparatus 20 transmits the acquiredupdating program to the power supply device 30 via the powertransmission path 25 (S16). The power supply device 30 receives theupdating program transmitted from the electronic apparatus 20 via thepower transmission path 25. Then, upon completing reception of theupdating program, the power supply device 30 executes the receivedupdating program (S17). Thereby, the power supply device 30 can updatethe program to be executed to a new program.

FIG. 4 shows a second flow of power charge and a program updatingprocess in the power charging system 10 according to the presentembodiment. The power charging system 10 may execute a program updateaccording to the second flow shown in FIG. 4 instead of the first flow.

First, in a state that the electronic apparatus 20 is not placed on thepower supply device 30, the electronic apparatus 20 acquires, from theoutside of the electronic apparatus 20 (for example, from a server or anexternal memory), an updating program for updating a program to beexecuted by the power supply device 30 (S21). For example, theelectronic apparatus 20 periodically accesses a server to confirmwhether there is a latest updating program, and, when there is a latestupdating program, downloads the program. Then, the electronic apparatus20 stores the acquired updating program therein.

Subsequently, the electronic apparatus 20 is placed on the power supplydevice 30 (S22). Subsequently, the power supply device 30 supplies powerto the electronic apparatus 20 via the power transmission path 25, undera condition that the electronic apparatus 20 is located at a positionwhere the electronic apparatus 20 can receive power. The power supplyprocessing is executed in a manner similar to the processing of the stepS12 shown in FIG. 3. Thereby, the electronic apparatus 20 can charge thesecondary battery 34 with power supplied from the power supply device 30(S23).

Then, the power supply device 30 stops power supply at a time whensufficient power is stored in the secondary battery 34 of the electronicapparatus 20. When power supply is stopped, the electronic apparatus 20subsequently inquires, via the power transmission path 25, whether toupdate a program (S24). More specifically, in a state that theelectronic apparatus 20 has been located at a position where theelectronic apparatus 20 can receive power from the power supply device30 and is not receiving power from the power supply device 30, theelectronic apparatus 20 inquires, via the power transmission path 25,whether to update the program, under a condition that an updatingprogram is stored therein.

Subsequently, in response to receiving the inquiry from the electronicapparatus 20 concerning whether to update the program, the power supplydevice 30 answers that the program is to be updated if the update ispossible (S25). Subsequently, when the power supply device 30 answersthat the program is to be updated, the electronic apparatus 20 transmitsthe stored updating program to the power supply device 30 via the powertransmission path 25 (S26). In this case, when the electronic apparatus20 stores a plurality of types of updating programs therein, theelectronic apparatus 20 acquires, in advance via power transmission path25, the identification information of the power supply device 30, andtransmits, to the power supply device 30 via the power transmission path25, an updating program for updating a program to be executed by anapparatus corresponding to the identification information.

The power supply device 30 receives the updating program transmittedfrom the electronic apparatus 20 via the power transmission path 25.Then, upon completing reception of the updating program, the powersupply device 30 executes the received updating program (S27). With theprocessing according to the flow, the power charging system 10 canupdate the program of the power supply device 30 even in an environmentwhere the electronic apparatus 20 cannot connect to a network in a statethe electronic apparatus 20 has been placed on the power supply device30 because the electronic apparatus 20 acquires the updating program inadvance when the electronic apparatus 20 is connected to a network andthe like.

FIG. 5 shows a third flow of power charge and a program updating processin the power charging system 10 according to the present embodiment. Thepower charging system 10 may execute a program update according to thethird flow shown in FIG. 5 instead of the first and second flows.

First, the electronic apparatus 20 is placed on the power supply device30 (S31). Subsequently, the power supply device 30 supplies power to theelectronic apparatus 20 via the power transmission path 25, under acondition that the electronic apparatus 20 has been located at aposition where the electronic apparatus 20 can receive power. The powersupply processing is executed in a manner similar to the processing ofthe step S12 shown in FIG. 3. Thereby, the electronic apparatus 20 cancharge the secondary battery 34 with power supplied from the powersupply device 30 (S32).

Then, the power supply device 30 stops power supply at a time whensufficient power is stored in the secondary battery 34 of the electronicapparatus 20. When power supply is stopped, the electronic apparatus 20subsequently inquires, via the power transmission path 25, whether toupdate a program (S33). More specifically, in a state that theelectronic apparatus 20 has been located at a position where theelectronic apparatus 20 can receive power from the power supply device30 and is not receiving power from the power supply device 30, theelectronic apparatus 20 inquires, via the power transmission path 25,whether to update the program, under a condition that an updatingprogram is stored therein.

In response to receiving the inquiry from the electronic apparatus 20whether to update the program, the power supply device 30 transmits, tothe electronic apparatus 20 via the power transmission path 25, arequest to update the program if the update is possible (S34). Inresponse to receiving the request to update the program from the powersupply device 30, the electronic apparatus 20 registers therein therequest to update the program from the power supply device 30 (S35).

Subsequently, the electronic apparatus 20 is removed from above thepower supply device 30 (S36). In a state that the electronic apparatus20 is not placed on the power supply device 30, the electronic apparatus20 acquires the updating program of the power supply device 30 from theoutside of the electronic apparatus 20 (for example, from a server or anexternal memory), under a condition that the request to update theprogram is registered therein (S37). Then, the electronic apparatus 20stores therein the acquired updating program.

Subsequently, the electronic apparatus 20 is placed on the power supplydevice 30 again (S37). The power supply device 30 supplies power to theelectronic apparatus 20 via the power transmission path 25, under acondition that the electronic apparatus 20 has been located at aposition where the electronic apparatus 20 can receive power. Theelectronic apparatus 20 charges the secondary battery 34 inside thereofwith power supplied from the power supply device 30 (S38).

Subsequently, the electronic apparatus 20 transmits the stored updatingprogram via the power transmission path 25 to the power supply device 30that has issued the request to update the program, (S39). For example,the electronic apparatus 20 determines whether the power supply device30 on which the electronic apparatus 20 is placed is an apparatus thathas issued the request to update the program by acquiring theidentification information of the power supply device 30.

The power supply device 30 receives the updating program transmittedfrom the electronic apparatus 20 via the power transmission path 25.Then, upon completing reception of the updating program, the powersupply device 30 executes the received updating program (S40). With theprocessing according to the flow, the power charging system 10 canacquire an updating program efficiently because the updating program isacquired after the electronic apparatus 20 receives a request from thepower supply device 30.

FIG. 6 shows a fourth flow of power charge and a program updatingprocess in the power charging system 10 according to the presentembodiment. The power charging system 10 may execute a program updateaccording to the fourth flow shown in FIG. 6 instead of the first tothird flows.

First, a first electronic apparatus 20-1 is placed on the power supplydevice 30 (S41). Subsequently, the power supply device 30 supplies powerto the first electronic apparatus 20-1 via the power transmission path25, under a condition that the first electronic apparatus 20-1 has beenlocated at a position where the first electronic apparatus 20-1 canreceive power. The power supply processing is executed in a mannersimilar to the processing of the step S12 shown in FIG. 3. Thereby, thefirst electronic apparatus 20-1 can charge the secondary battery 34 withpower supplied from the power supply device 30 (S42).

Then, the power supply device 30 stops power supply at a time whensufficient power is stored in the secondary battery 34 of the firstelectronic apparatus 20-1. When power supply is stopped, the firstelectronic apparatus 20-1 subsequently transmits, to the power supplydevice 30 via the power transmission path 25, a request to acquire afirst program to be executed for the first electronic apparatus 20-1(S43). More specifically, the first electronic apparatus 20-1 transmitsa request to acquire the first program, under a condition that theelectronic apparatus 20 has been located at a position where theelectronic apparatus 20 can receive power from the power supply device30, and is not receiving power from the power supply device 30.

Upon receiving the request from the first electronic apparatus 20-1, thepower supply device 30 registers therein the request received from thefirst electronic apparatus 20-1 (S44). Then, the first electronicapparatus 20-1 is removed from above the power supply device 30 (S45).

Subsequently, a second electronic apparatus 20-2 is placed on the powersupply device 30 (S46). Subsequently, the power supply device 30supplies power to the second electronic apparatus 20-2 via the powertransmission path 25, under a condition that the second electronicapparatus 20-2 has been placed at a position where the second electronicapparatus 20-2 can receive power. Thereby, the second electronicapparatus 20-2 can charge the secondary battery 34 with power suppliedfrom the power supply device 30 (S42).

Then, the power supply device 30 stops power supply at a time whensufficient power is stored in the secondary battery 34 of the secondelectronic apparatus 20-2. When power supply is stopped, the powersupply device 30 subsequently transmits, to the second electronicapparatus 20-2 via the power transmission path 25, a request to acquirethe first program (S48). More specifically, the power supply device 30transmits, to the second electronic apparatus 20-2, the request toacquire the first program, under a condition that the request from thefirst electronic apparatus 20-1 is registered therein, the secondelectronic apparatus 20-2 has been located at a position where thesecond electronic apparatus 20-2 can receive power and power is notsupplied to the second power supply device 30-2. In response toreceiving, from the power supply device 30, the request to acquire thefirst program, the second electronic apparatus 20-2 registers thereinthe request to acquire the first program from the power supply device 30(S49).

Subsequently, the second electronic apparatus 20-2 is removed from abovethe power supply device 30 (S50). In a state that the second electronicapparatus 20-2 is not placed on the power supply device 30, the secondelectronic apparatus 20-2 acquires, from the outside of the secondelectronic apparatus 20-2 (for example, from a server or an externalmemory), the first program indicated in the request, under a conditionthat the request received from the power supply device 30 is registeredtherein and the program can be acquired from the outside (S51). Then,the second electronic apparatus 20-2 stores therein the acquired firstprogram.

Subsequently, the second electronic apparatus 20-2 is placed on thepower supply device 30 again (S52). The power supply device 30 suppliespower to the second electronic apparatus 20-2 via the power transmissionpath 25, under a condition that the second electronic apparatus 20-2 hasbeen placed at a position where the second electronic apparatus 20-2 canreceive power. The second electronic apparatus 20-2 charges thesecondary battery 34 inside thereof with power supplied from the powersupply device 30 (S53).

Subsequently, the second electronic apparatus 20-2 transmits the firstprogram stored therein to the power supply device 30 via the powertransmission path 25, under a condition that the second electronicapparatus 20-2 stores the first program therein, and has been located ata position where the second electronic apparatus 20-2 can receive powerfrom the power supply device 30 (S54). Upon receiving the first programfrom the second electronic apparatus 20-2, the power supply device 30stores the received first program therein (S55). Then, the secondelectronic apparatus 20-2 is removed from above the power supply device30 (S56).

Subsequently, the first electronic apparatus 20-1 is placed on the powersupply device 30 again (S57). The power supply device 30 supplies powerto the first electronic apparatus 20-1 via the power transmission path25, under a condition that the first electronic apparatus 20-1 has beenlocated at a position where the first electronic apparatus 20-1 canreceive power. The first electronic apparatus 20-1 charges the secondarybattery 34 inside thereof with power supplied from the power supplydevice 30 (S58).

Subsequently, the power supply device 30 transmits, to the first powersupply device 30-1 via the power transmission path 25, the first programstored therein (S59). More specifically, the power supply device 30transmits the first program to the first electronic apparatus 20-1,under a condition that the first program is stored therein and the firstelectronic apparatus 20-1 is located at a position where the firstelectronic apparatus 20-1 can receive power. For example, the powersupply device 30 determines whether the placed power supply device 30 isan apparatus that has issued the request to acquire the program byacquiring the identification information of the electronic apparatus 20.

The first electronic apparatus 20-1 receives the first programtransmitted from the power supply device 30 via the power transmissionpath 25. Then, upon completing reception of the first program, the firstelectronic apparatus 20-1 executes the received first program (S60).

With the processing according to the flow, the power charging system 10can cause an updating program for the first electronic apparatus 20-1 tobe acquired by the second electronic apparatus 20-2 to transfer theupdating program from the second electronic apparatus 20-2 to the firstelectronic apparatus 20-1 via the power supply device 30. Thereby, thepower charging system 10 can update a program to be executed by thefirst electronic apparatus 20-1 even when the first electronic apparatus20-1 does not have a function to connect to a network or an externalmemory.

FIG. 7 shows the functions and configuration of the power chargingsystem 10 according to a first variant of the present embodiment.Because the power charging system 10 according to the first variantadopts the functions and configuration substantially the same with thoseof the power charging system 10 explained in conjuncture with FIGS. 1 to6, only differences are explained.

The power supply device 30 according to the present variant further hasthe program acquiring unit 40. Also, the electronic apparatus 20according to the present variant may not have the program acquiring unit40. The power supply device 30 according to the present variant canconnect to a server via a network, or acquire data from an externalmemory.

The program acquiring unit 40 acquires and stores therein an updatingprogram for the electronic apparatus 20 via the network or the externalmemory. Then, in a state that the electronic apparatus 20 is placedthereon, the power supply device 30 according to the present varianttransmits the acquired updating program to the electronic apparatus 20via the power transmission path 25. Thereby, the power charging system10 can update the program to be executed by the electronic apparatus 20even when the electronic apparatus 20 does not have a function toconnect to a network or an external memory.

FIG. 8 shows the appearance of the power charging system 10 according toa second variant of the present embodiment. Because the power chargingsystem 10 according to the second variant adopts the functions andconfiguration substantially the same with those of the power chargingsystem 10 explained in conjuncture with FIGS. 1 to 6, only differencesare explained.

The power charging system 10 according to the present variant can supplypower to a plurality of the electronic apparatus 20 concurrently. In thepresent variant, the power supply device 30 has a plurality of the powersupply units 52 therein, and can form a plurality of the powertransmission paths 25 simultaneously. Then, when the electronicapparatus 20 are placed thereon, the power supply device 30 detects thepositions where the electronic apparatus 20 are placed, and operates thepower supply units 52 corresponding to the electronic apparatus 20 atthe detected positions to supply power to the corresponding electronicapparatus 20.

Also, in the present variant, one of the plurality of the electronicapparatus 20 to be placed on the power supply device 30 acquires, fromthe outside, a program to be executed by the power supply device 30.Then, in the present variant, the electronic apparatus 20 that hasacquired the program from the outside transmits the program to the powersupply device 30 via the power transmission path 25.

FIG. 9 shows the functions and configuration of the power supply device30 in the power charging system 10 according to the second variant ofthe present embodiment. The power supply device 30 has the plurality ofthe power supply units 52, a plurality of the supply control units 54, aplurality of the supply-side communicating units 56, the controlprocessor 58, a power control unit 70, and a power amount display unit72.

Each of the plurality of the supply control units 54 and each of theplurality of the supply-side communicating units 56 are providedcorresponding to each of the plurality of the power supply units 52. Thecontrol processor 58 exchange data with the plurality of the supply-sidecommunicating units 56 and controls the entire operation of the powersupply device 30.

The power control unit 70 controls each of the plurality of the supplycontrol units 54 to control the amount of power supplied to theplurality of the electronic apparatus 20. The power control unit 70 maybe realized as a function of the control processor 58. The power amountdisplay unit 72 displays the total amount of power supplied from thepower supply device 30 to the electronic apparatus 20.

In the power supply device 30, when one of the electronic apparatus 20is located at a position where the electronic apparatus 20 can receivepower from the power supply device 30, the supply-side communicatingunit 56 communicates with the electronic apparatus 20 via thecorresponding power transmission path 25 to acquire the maximum powerconsumption value of the electronic apparatus 20. Then, when the powersupply device 30 supplies power to the plurality of the electronicapparatus 20 concurrently, the power control unit 70 limits the suppliedpower amount based on the maximum power consumption value of each of theplurality of the electronic apparatus 20 so that the total suppliedpower amount does not become a predetermined value or higher.

For example, the power control unit 70 switches over from one of theelectronic apparatus 20 to another, to which power is supplied, atpredetermined intervals, or makes the amount of power to be supplied tothe plurality of the electronic apparatus 20 smaller than that at thenormal time. Thereby, the power control unit 70 can prevent anexpectedly large current from flowing when the plurality of theelectronic apparatus 20 is placed. Also, the power amount display unit72 may display the total power amount to allow the user to recognize theamount of power being supplied.

While the embodiment (s) of the present invention has (have) beendescribed, the technical scope of the invention is not limited to theabove described embodiment (s). It is apparent to persons skilled in theart that various alterations and improvements can be added to theabove-described embodiment (s). It is also apparent from the scope ofthe claims that the embodiments added with such alterations orimprovements can be included in the technical scope of the invention.

The operations, procedures, steps, and stages of each process performedby an apparatus, system, program, and method shown in the claims,embodiments, or diagrams can be performed in any order as long as theorder is not indicated by “prior to,” “before,” or the like and as longas the output from a previous process is not used in a later process.Even if the process flow is described using phrases such as “first” or“next” in the claims, embodiments, or diagrams, it does not necessarilymean that the process must be performed in this order.

What is claimed is:
 1. A power supply device that supplies power to anelectronic apparatus in a non-contact manner, the power supply devicecomprising: a power supply unit that supplies power to the electronicapparatus via a power transmission path from the power supply device tothe electronic apparatus, a communicating unit that transmits a requestto transmit a program via the power transmission path.
 2. The powersupply device according to claim 1, wherein the communicating unittransmits the request to transmit the program in response to an inquiryfrom the electronic apparatus concerning whether to update the program.3. The power supply device according to claim 1, wherein thecommunicating unit transmits to the electronic apparatus the request totransmit the program in response to receiving a request for the programfrom another electronic apparatus that is different from the electronicapparatus.
 4. The power supply device according to claim 1, wherein thecommunicating unit transmits the request to transmit the program under acondition that the power supply device is not supplying power to theelectronic apparatus.
 5. The power supply device according to claim 2,wherein the communicating unit transmits the request to transmit theprogram under a condition that the power supply device is not supplyingpower to the electronic apparatus.
 6. The power supply device accordingto claim 1, wherein the program is a program that the power supplydevice executes.
 7. The power supply device according to claim 2,wherein the program is a program that the power supply device executes.8. The power supply device according to claim 1, further comprising: acontrol unit that controls power supply to the electronic apparatus byexecuting the program.
 9. The power supply device according to claim 3,wherein the communicating unit transmits the request to transmit theprogram when power supply from the power supply device to the electronicapparatus is stopped.
 10. An electronic apparatus that receives powerfrom a power supply device in a non-contact manner, the electronicapparatus comprising: a non-contact type power receiving unit thatreceives power via a power transmission path from the power supplydevice to the electronic apparatus; and a communicating unit thattransmits, to the power supply device via the power transmission path, aprogram to be executed by a second electronic apparatus separated fromthe electronic apparatus.
 11. The electronic apparatus according toclaim 10, wherein the program is an updating program to update a programof the second electronic apparatus.
 12. The electronic apparatusaccording to claim 10, wherein the communicating unit transmits theprogram to the power supply device under a condition that thenon-contact type power receiving unit is not receiving power from thepower supply device.
 13. The electronic apparatus according to claim 10,further comprising an acquiring section that acquires the program via anetwork or an external memory.
 14. The electronic apparatus according toclaim 10, wherein the communicating unit: transmits an inquiry, via thepower transmission path, to the power supply device; and upon receipt ofa response indicating that a current program is to be updated, transmitsthe program to the power supply device via the power transmission path.15. The electronic apparatus according to claim 10, wherein thecommunicating unit: acquires identification information from the powersupply device via the power transmission path; and transmits, to thepower supply device via the power transmission path, a program to beexecuted by an apparatus corresponding to the identification informationas the program.
 16. The electronic apparatus according to claim 15,wherein the communicating unit: registers a request for a program updatereceived from the power supply device via the power transmission path;acquires the program from the network or an external memory and storesthe program, after the request for the program update is registered; andtransmits the program via the power transmission path to the powersupply device that issued the request for the program update, after theprogram is stored.
 17. The electronic apparatus according to claim 10,wherein the communicating unit controls the non-contact type powerreceiving unit to transmit the program after stopping a supply of thereceived power.
 18. The electronic apparatus according to claim 10,wherein the communicating unit transmits the program by modulating acurrent via the power transmission path.
 19. A non-transitory recordingmedium storing instructions that, when executed, cause an electronicapparatus to perform operations including: receiving power via anon-contact type power transmission path from a power supply device tothe electronic apparatus; and transmitting, to the power supply devicevia the non-contact type power transmission path, a program to beexecuted by a second electronic apparatus separated from the electronicapparatus.
 20. The non-transitory recording medium according to claim19, wherein the operations further comprise causing the electronicapparatus to acquire the program via a network or an external memory.